Beam form

Abstract

Block-forming means or shuttering apparatus for precast units of especially long dimension along one axis, a horizontal basic frame and two block-forming or shuttering walls of which are means for at least one is guided slidably being selectively adjustable along the basic frame to change the mutual distance between the two shuttering walls, piston and cylinder assemblies 16 for driving of said sliding guided means, and clamping means 19 for clamping together one of the slidable shuttering walls and the basic frame.

What is claimed is: 
     
       1. Shuttering apparatus for forming precast concrete units especially of long dimension along a given axis comprising: a horizontal basic frame having two shuttering walls of which at least one is a guided slidable shuttering wall selectively adjustable on transverse girders of the horizontal basic frame to change the mutual distance between the two shuttering walls;   piston and cylinder assembly means (16) for driving movements of the slidable shuttering wall and   a plurality of clamping device means (19) on the slidable shuttering wall, each having a frame (30,31,32) surrounding a transverse girder (23) for slidable movement therealong and means on the frame for selectively pressing together the slidable shuttering wall (3) and the basic frame (1).   
     
     
       2. Shuttering apparatus according to claim 1, wherein the horizontal basic frame (1) comprises several parallel mounted ones of said transverse girders (4,23) having an I-beam profile; said slidable shuttering wall (3,25,27,28,29) being provided with supports (11,26) mounted on horizontal sliding skids (13,24) connecting a lower edge of the slidable shuttering wall with the lower ends of the supports and;   the sliding skids (13,24) lie parallel up on the transverse girders (4,23) being guided along these girders slidably by means of fingers (48) disposed beneath and the upper transverse flanges of the transverse girders.   
     
     
       3. Shuttering apparatus according to claim 2 wherein one of said clamping device means (19,30 to 33) is provided for each of the sliding skids (13,24). 
     
     
       4. Shuttering apparatus according to claim 3 wherein each clamping device means (19, 30 to 33) is arranged near to an end of a sliding skid (13,24). 
     
     
       5. Shuttering apparatus according to claim 3 wherein a clamping device means comprises a frame means (30,31,32) surrounding a transverse girder (23) and a piston and cylinder assembly means having a short stroke, the piston of said piston and cylinder assembly means (51) comprising a pressure plate (34) for pressing against the transverse girder. 
     
     
       6. Shuttering apparatus according to claim 5 wherein the pressure plate (34) has an area (52) which is moulded in a relief shape pattern having projecting portions. 
     
     
       7. Shuttering apparatus according to claim 2 wherein the piston and cylinder assembly means (16,41) are mounted on the end portions at the transverse girders (23) for driving the slidable shuttering wall (3).